HttpContext.Current.Session 在 Ashx 文件中为 null

问题描述：

我看到了一些问题(这里和此处)但他们没有回答我的问题.我正在尝试使用ajax.ashx"文件调用 Ajax，并在函数中访问会话.出于某种原因，Session 对象本身的值为 null.

I saw some questions (Here and Here) but they do not answer my question. I am trying to call Ajax using "ajax.ashx" file, and in function to access Session. For some reason, the value of the Session object itself is null.

使用示例:

Session = HttpContext.Current.Session // This is null

或者:

public virtual void ProcessRequest(HttpContext context)
{
    System.Web.SessionState.HttpSessionState Session = context.Session; 
    // This is null
}

在 Web.config 中:

In the Web.config:

<sessionState timeout="1800"></sessionState>

答

您必须在处理程序中添加 IRequiresSessionState 声明为:

You must add on your handler the IRequiresSessionState on the declaration of it as:

public class YourHandleName : IHttpHandler, IRequiresSessionState 
{
...

默认情况下，处理程序不与会话连接以保持最小，通过添加 IRequiresSessionState 将它们附加到会话中.

by default the handlers are not connected with the session to keep them minimum, by adding the IRequiresSessionState you attach them with the session.

HttpContext.Current.Session 在 Ashx 文件中为 null

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